Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2019 ( 258 )

2018 ( 374 )

2017 ( 400 )

2016 ( 492 )

Custom range...

Search Results: 1 - 10 of 184505 matches for " Kênia Almeida;Oliveira "
All listed articles are free for downloading (OA Articles)
Page 1 /184505
Display every page Item
Sweet pepper seed responses to inoculation with microorganisms and coating with micronutrients, aminoacids and plant growth regulators
Diniz, Kênia Almeida;Silva, Paulo de Albuquerque;Oliveira, Jo?o Almir;Evangelista, José Renato Emiliorelli;
Scientia Agricola , 2009, DOI: 10.1590/S0103-90162009000300002
Abstract: small sized seeds, such as the horticultural species, have limited quantities of reserves that can be balanced by coating then with essential nutrients for their initial development. in addition, inoculation of the seeds with microorganisms may protect the plants against phytopathogens, thus enhancing their growth. the present work had the objective of evaluate the physiological quality and seedling development of sweet pepper seeds and seedlings coated with several kind of films. seeds were first coated with polymers and then with antagonistic microorganisms (trichoderma viride, trichoderma polysporhum, trichoderma stromaticum, beauveria bassiana, metarhizium anisopliae), mycorrhizas, aminoacids, micronutrients and plant growth regulators. evaluation was performed for percentage of germination and for seedling emergence, speed of emergence index, number of plants, dry mass of the aerial and root parts and height of the seedlings. inoculation with trichoderma viride increased the percentage and rate of the seedlings emergence inoculation with trichoderma viride, metarhizium anisopliae and mycorrhizas promote better seedling development; seed microbiolization with microorganisms trichoderma viride, t. polysporhum, t. stromaticum, beauveria bassiana, metarhizium anisopliae. mycorrhizas mixture negatively affected seeds and seedling quality. seed covering with plant growht regulator, at a 5 ml kg-1 dose increased the roots dry matter.
Análise fisiológica e ultra-estrutural durante o desenvolvimento e a secagem de sementes de soja
Silva, Paulo de Albuquerque;Diniz, Kênia Almeida;Oliveira, Jo?o Almir;Pinho, édila Vilela de Rezende Von;
Revista Brasileira de Sementes , 2007, DOI: 10.1590/S0101-31222007000200003
Abstract: during development and drying, a number of protection mechanisms act on the maintenance of seed physiological quality. some of these mechanisms maintain the integrity of the cells, which is fundamental to the perfect functioning of cell metabolism. the study of the ultra-structure enables visualization of damage caused by drying in the absence of protection mechanisms. in this research, damage occurred during the soybean seed development and drying was studied by means of scanning electron microscopy (sem). in addition, seeds were also evaluated regarding the physiological quality. thus, seeds in different developmental stages were collected and submitted to different drying temperatures and treatments. evaluations were made concerning the seed physiological quality by means of the germination test, cold test, emergence test under controlled conditions and electrical conductivity test. the damages were visualized by means of scanning electron microscopy utilizing the leo evo40 microscope. the results showed that the soybean seeds become desiccation tolerant when they possess around 30% water content. drying of seeds with moisture content above 30% caused reduction in cellular volume, disorganization of the cell walls and decrease in seed physiological quality. higher germination values were observed in seeds with 30% moisture content in the field, whereas higher values of vigor were observed in seeds with 40% of moisture content in the field.
Armazenamento e qualidade de sementes de tomate enriquecidas com micronutrientes e reguladores de crescimento
Albuquerque, Kênia Almeida Diniz;Oliveira, Jo?o Almir;Silva, Paulo de Albuquerque;Veiga, André Delly;Carvalho, Bruno Oliveira;Alvim, Patrícia de Oliveira;
Ciência e Agrotecnologia , 2010, DOI: 10.1590/S1413-70542010000100002
Abstract: the objective of this study was to evaluate the effect of the application of micronutrients and growth regulators on the germination, vigor, activity of some enzymes, and on the total protein contents in tomato seeds during the storage. the seeds were treated with the chemicals starter?, cellerate?, and stimulate? at the dosages corresponding to 0%, 50%, 100%, 150%, and 200% of the dose recommended by the manufacturer, utilizing the film-coating technique. the evaluations were performed at 0, 6, and 12 months of storage by the following parameters: percentage of germination, percentage and emergency velocity rate, activity of enzymes endo-a-mannanase and esterase, total protein content, and health. the completely randomized design in a 3 x 5 x 3 factorial structure was utilized, namely, three chemicals, five doses, and three storage periods with four replicates of 50 seeds per treatment. coating with the chemicals based on micronutrients and growth regulators and storage interfere on the activity of enzyme endo-a-mannanase in the tomatoes and seeds; the activity of enzyme esterase increases with the storage of tomato seeds, pointing to an increase in the deterioration process; there is an increase in the total protein content in tomato seeds throughout the storage period; chemicals based on growth regulators promote an increase in emergency velocity rate of the tomato seedlings when applied at pre-sowing at the recommended dose.
Tolerancia de sementes de soja à desseca??o
Veiga, Adriano Delly;Rosa, Sttela Dellyzete Veiga Franco da;Silva, Paulo de Albuquerque;Oliveira, Jo?o Almir de;Alvim, Patrícia de Oliveira;Diniz, Kênia Almeida;
Ciência e Agrotecnologia , 2007, DOI: 10.1590/S1413-70542007000300025
Abstract: the anticipated harvest of seeds after physiological maturity allows the obtaining of the better quality physiological, crop rotation and optimization of the processing structures. seeds do not tolerate dissection over all the stages and acquire tolerance in particular stages during maturation, this acquisition of dissection tolerance may coincide with physiological maturity and in soybean seeds, it take place at r7 stage with moisture close from 45% to 50%. so, the present research was intended to evaluate dissection tolerance of soybean seeds. the seeds were harvested at three phenologic stages, r6, r6/r7 and r7 and were submitted to artificial drying at 35oc to 20% of water content and at 42oc to 13%. a fourth harvest was accomplished with field dried seeds, these being utilized as a control. the quality of seeds was evaluated by tests of germination, electric conductivity and of cold, of dry weight of seedlings and lea protein electrophoresis.the experimental design was completely randomized in factorial scheme with four replicates. the control was compared singly with each treatment. from the results, it follows that both germinability and dissection tolerance of soybean seeds increase with the natural water loss in the field; seeds harvest at r7stage show increased physiologic quality, distinct pattern of lea proteins and greater dissection tolerance than at r6 and r6/r7stages; seeds drying harvested close to maturity induces the synthesis of lea proteins; and seeds harvested at r7 stage present physiological quality and lea protein pattern similar to the ones of filed dried seeds up to 14% of water content.
Incorpora??o de microrganismos, aminoácidos, micronutrientes e reguladores de crescimento em sementes de alface pela técnica de peliculiza??o
Diniz, Kênia Almeida;Oliveira, Jo?o Almir;Guimar?es, Renato Mendes;Carvalho, Maria Laene Moreira de;Machado, José da Cruz;
Revista Brasileira de Sementes , 2006, DOI: 10.1590/S0101-31222006000300006
Abstract: seed coating is a technology that allows incorporation of additive to the seeds, without change its size or form. the coating technique is a strategy that guarantees high seedling emergence in the field, gain in productivity and better aggregation of agricultural inputs to the seeds. thus, this study had the objective of evaluating the effect of the incorporation of antagonistic microorganisms, mycorrhiza, amino acids, micronutrients and growth regulators through the seed coating technique on the quality of lettuce seeds. the seeds were coated with two types of polymer that were applied together with antagonistic microorganisms (trichoderma viride, trichoderma polysporhum, trichoderma stromaticum, beauveria bassiana, metarhizium anisopliae), mycorrhiza, amino acids, micronutrients and growth regulators according to the methodology proposed by the manufacturer. the germination percentage and emergence, the emergence speed index, the number of plants, the dry mass of aerial and root parts and the height of the seedlings were evaluated. microbiolization of the seeds with the mixture of microorganisms trichoderma viride, t. polysporhum, t. stromaticum, beauveria bassiana, metarhizium anisopliae and mycorrhiza negatively affected the quality of the lettuce seeds. the inoculation of lettuce seeds with trichoderma viride and growth regulator increased the percentage and the seedling emergence speed index.
Qualidade de sementes de alface enriquecidas com micronutrientes e reguladores de crescimento durante o armazenamento
Diniz, Kênia Almeida;Oliveira, Jo?o Almir;Silva, Paulo de Albuquerque;Guimar?es, Renato Mendes;Carvalho, Maria Laene Moreira de;
Revista Brasileira de Sementes , 2009, DOI: 10.1590/S0101-31222009000100026
Abstract: it is known that micronutrients and growth regulators are important metabolism activators, which can bring benefits to germination and seed vigor when incorporated into the treatment and so increase the developmental potential of the plants in the field. the objective of this study was to evaluate the effect of applying micronutrients and growth regulators in germination, vigor, on the activity of some enzymes and on the total protein contents in lettuce seeds during storage. the seeds were treated with the chemicals starter?, cellerate? and stimulate? at the dosages corresponding to 0%, 50%, 100%, 150% and 200% of the dose recommended by the manufacturer, using the film-coating technique. the evaluations were performed at 0, 6 and 12 months of storage on the following parameters: germination percentage, emergence percentage and speed index, activity of enzymes endo-β-mannanase and esterase, total protein content and health. it was concluded that growth regulators promoted an increase in the emergence speed index of the lettuce seedlings when applied at the dose recommended and at pre-sowing; the coating of the lettuce seeds with the double the recommended dose of the chemicals based on micronutrients and growth regulators, reduced their quality; the activity of the esterase enzyme increases with the storage of lettuce seeds, pointing to an increase in the decaying process; the coating with both micronutrients and growth regulators and storage interfere in the activity of the endo-β-mannanase enzyme in lettuce and seeds.
A descentraliza??o da política nacional de ATER: uma experiência nos assentamentos de reforma agrária no noroeste mineiro - Brasil
Almeida, Suênia Cibeli Ramos de;Oliveira, Marcelo Nascimento de;Xavier, José Humberto Valadares;
Sociedade & Natureza , 2010, DOI: 10.1590/S1982-45132010000300011
Abstract: the citizen society participation in formulation, implementation and fiscalization of the public politics was granted to decentralization. the universalization of this process has been reinforcing by way of the technical assistance and rural extension services operates by ngo - non-governmental organization since the decade 1990. farms social organization participation has been enlarging after the rural extension and technical assistance national politic regulation. this text presents one analyze about the experienced have lived by development agents in agrarian reform settlement in unaí, minas gerais state.
Polynomial Generalizations and Combinatorial Interpretations for Sequences Including the Fibonacci and Pell Numbers  [PDF]
Cecília Pereira de Andrade, José Plínio de Oliveira Santos, Elen Viviani Pereira da Silva, Kênia Cristina Pereira Silva
Open Journal of Discrete Mathematics (OJDM) , 2013, DOI: 10.4236/ojdm.2013.31006
Abstract: In this paper we present combinatorial interpretations and polynomials generalizations for sequences including the Fibonacci numbers, the Pell numbers and the Jacobsthal numbers in terms of partitions. It is important to mention that results of this nature were given by Santos and Ivkovic in two papers published on the Fibonacci Quarterly, Polynomial generalizations of the Pell sequence and the Fibonacci sequence [1] and Fibonacci Numbers and Partitions [2] , and one, by Santos, on Discrete Mathematics, On the Combinatorics of Polynomial generalizations of Rogers-Ramanujan Type Identities [3]. By these results one can see that from the q-series identities important combinatorial information can be obtained by a careful study of the two variable function introduced by Andrews in Combinatorics and Ramanujan's lost notebook [4].
Estimativa de parametros de aquíferos através do coeficiente de recess?o em áreas de embasamento cristalino de Minas Gerais
Silva, Rebeca Ferreira Gonzaga;Bacellar, Luis de Almeida Prado;Fernandes, Kênia Nassau;
Rem: Revista Escola de Minas , 2010, DOI: 10.1590/S0370-44672010000300007
Abstract: the recession coefficient (α) indicates the production rate of the baseflow, that represents the part of the river flow which is predominately maintained by groundwater restitution. it can be obtained through hydrographic analysis. this coefficient allows the calculation of important parameters, such as aquifer transmissivity, renewable groundwater reserves, and low flow in drainage channels that usually are obtained through other hydrological indexes, such as the q7,10, frequently used in the management of surfi cial hydrological resources. the studied basins are located in the central-southern region of the minas gerais state, in areas of granite-gneissic rocks, with similar vegetation, climate and landuse. the results were satisfactory, showing that the determination methods for the recession coefficients may be used to characterize groundwater production in the hydrographic basins of the crystalline basement. the groundwater discharged into the drainage systems is greater in areas with smoother relief, indicating that they constitute the best recharge areas.
Neoplastic Transformation of T Lymphocytes through Transgenic Expression of a Virus Host Modification Protein
Sílvia Cristina Paiva Almeida, Vivian Leite de Oliveira,nia Ventura, Margarita Bofill, Robert Michael Evans Parkhouse
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0034140
Abstract: Virus host evasion genes are ready-made tools for gene manipulation and therapy. In this work we have assessed the impact in vivo of the evasion gene A238L of the African Swine Fever Virus, a gene which inhibits transcription mediated by both NF-κB and NFAT. The A238L gene has been selectively expressed in mouse T lymphocytes using tissue specific promoter, enhancer and locus control region sequences for CD2. The resulting two independently derived transgenic mice expressed the transgene and developed a metastasic, angiogenic and transplantable CD4+CD8+CD69– lymphoma. The CD4+CD8+CD69– cells also grew vigorously in vitro. The absence of CD69 from the tumour cells suggests that they were derived from T cells at a stage prior to positive selection. In contrast, transgenic mice similarly expressing a mutant A238L, solely inhibiting transcription mediated by NF-κB, were indistinguishable from wild type mice. Expression of Rag1, Rag2, TCRβ-V8.2, CD25, FoxP3, Bcl3, Bcl2 l14, Myc, IL-2, NFAT1 and Itk, by purified CD4+CD8+CD69– thymocytes from A238L transgenic mice was consistent with the phenotype. Similarly evaluated expression profiles of CD4+CD8+ CD69– thymocytes from the mutant A238L transgenic mice were comparable to those of wild type mice. These features, together with the demonstration of (mono-)oligoclonality, suggest a transgene-NFAT-dependent transformation yielding a lymphoma with a phenotype reminiscent of some acute lymphoblastic lymphomas.
Page 1 /184505
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.